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URL: https://oeis.org/A126045

⇱ A126045 - OEIS

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A126045
Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 5.
0
2, 3, 0, 2, 3, 2, 4, 1, 1, 4, 2, 2, 1, 2, 4, 3, 1, 2, 3, 3, 4, 1, 3, 2, 1, 4, 2, 3, 3, 4, 1, 4, 3, 2, 4, 1, 2, 3, 2, 1, 3, 1, 2, 2, 2, 1, 4, 1
OFFSET
1,1
FORMULA
a(n) = A010874(A000043(n)). - Michel Marcus, Apr 07 2018
MATHEMATICA
Array[Mod[MersennePrimeExponent@ #, 5] &, 45] (* Michael De Vlieger, Apr 07 2018 *)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Artur Jasinski, Dec 17 2006
EXTENSIONS
a(45)-a(47) from Ivan Panchenko, Apr 08 2018
a(48) from Amiram Eldar, Oct 14 2024
STATUS
approved